//------------------------------------------------------------------------------
// rewriter.cpp
// Simple tool that parses an input file and writes it back out; used
// for verifying the round-trip nature of the parse tree.
//
// File is under the MIT license; see LICENSE for details
//------------------------------------------------------------------------------

#include <cstdio>
#if defined(_WIN32)
#include <fcntl.h>
#include <io.h>
#endif

#include <filesystem>

#include "slang/syntax/SyntaxPrinter.h"
#include "slang/syntax/SyntaxTree.h"

using namespace slang;

int main(int argc, char** argv) try {
  if (argc != 2) {
    fprintf(stderr, "usage: rewriter file\n");
    return 1;
  }

  // Make sure we reproduce newlines correctly on Windows:
#if defined(_WIN32)
  _setmode(_fileno(stdout), _O_BINARY);
#endif

  if (!std::filesystem::exists(argv[1])) {
    fprintf(stderr, "File does not exist: %s\n", argv[1]);
    return 1;
  }

  if (!std::filesystem::is_regular_file(argv[1])) {
    fprintf(stderr, "%s is not a file\n", argv[1]);
    return 1;
  }

  auto tree = SyntaxTree::fromFile(argv[1]);
  printf("%s", SyntaxPrinter::printFile(*tree).c_str());
  return 0;
} catch (const std::exception& e) {
  printf("internal compiler error (exception): %s\n", e.what());
  return 2;
}